To prevent damage to the PTC thermistors, they are packaged in 0402 packages. PTC thermistors are packaged in the Tape & Reel (TR) as a safety measure. Temperature -40°C is the minimum operating temperature for PTC thermistors. This thermistor must not operate above 125°C in order for it to work. A thermistor has 2 pins. A PTC thermistor could provide 32V voltage when operating. A DC circuit shouldn't exceed 32V with this thermistor. thermistors with 32V maximum voltages are used in DC circuits.